Add basic chat experiment

No WebRTC stuff yet, but websockets works fine.

Need to host on nodejitsu or something and change the websocket address.

Compiled using coco 0.9.0, fuck clojurescript. Sorry you had to suffer
through that, aeosynth.

Added the compiled js to gitattributes, hoping github's diffs will honor
it too.

Run the server with `coco server.co`, and it'll eval the compiled
version with node, no repo pollution neccessary.